Effie

Effie is a minimalist, cross-platform writing and mind-mapping tool developed by Shanghai 七加二科技 (7+2 Technology) that combines a distraction-free text editor with integrated outlining and mind-mapping capabilities. It supports one-click conversion between outline lists and visual mind maps, cloud sync across Mac, Windows, iOS, and Android devices, and offline writing. An AI assistant layer (Effie AI) adds features like summarization, text expansion/shortening, tone adjustment, grammar checking, and AI-powered mind map node expansion and article generation.